On top of the 500 plus pepper plants we do at the In Laws big backyard garden, I plant some pepper plants in pots in my driveway to pick and eat for lunches over the summer. Last year, I had 10 Eastern Rocket Pepper plants. This year, I went with 6 Hungarian Wax pepper plants, and 2 Portugal Pepper plants. The Hungarians are medium hot, whereas the Portugals will come close to killing you.
UPDATE: It was impossible to tell as the peppers were budding, but the pepper plants I thought were Hungarian Wax are actually Eastern Rocket Pepper Plants. So the pics below are actually of Eastern Rockets.
They love the heat reflecting off my paved/sealed driveway, and the first buds are starting to appear.